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How do you evaluate ##arcsin(cos(pi/3))##?

    Answer is ##pi/6##

    ##sin^(-1)(cos(pi/3))=sin^-1(1/2)## (since ##cos60^@=1/2)##

    ##sin^(-1)(cos(pi/3))=sin^-1(sin(pi/6))##[since from angle table]

    ##sin^(-1)(cos(pi/3))=cancelsin^-1(cancel(sin)(pi/6))##

    ##arcsin(cos(pi/3))=pi/6##

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